Autograph lettercard signed.
St. Moritz, 2. IV. 1961.
Oblong 8vo. 2 pp.
€ 450,00
To Mrs. Norweg: "Many thanks for your deeply interesting letter. I wish I were able to answer your questions in a way that would be satisfactory to you. I have never found a thorough psychological study of this subject. I was myself an identical twin, but my brother died when only a few hours old. This fact, however, made me extremely attentive to all the identical twins that I have met in life [...]".
